Ladder



FIG. 1 is a front perspective view of a ladder.

FIG. 2 is a front view of the ladder of FIG. 1.

FIG. 3 is a right side view of the ladder of FIG. 1. The left side is a mirror image.

FIG. 4 is a rear view of the ladder of FIG. 1; and,

FIG. 5 is a top view of the ladder of FIG. 1.

The broken lines shown in the figures are for the purpose of illustrating boundary lines of the ladder and form no part of the claimed design. 

CLAIM The ornamental design for a ladder, as shown and described. 